I understand what you're saying, but I take issue with having to repeat something at a college level because some tard simply didn't pay attention for a full 15 minutes of the lecture.
College level. High school and lower would be a different story.
I thought this too. Yet it happened in class very regularly. I was particularly depressed when I realized that there was one guy who seemed to take a lot of the same classes I did over the years and somehow he was still managing to pass despite asking questions like this. The difference was, perhaps, that my guy was actually paying attention and would still ask the professors questions he had just answered.
My favorite was a two day lecture on the software and hardware involved in hard drives. The lecturer completely covered every possible useful subject on hard drives including the general mechanics and the computer concepts involved. After the two day lecture on this, my favorite fellow student at the time raises his hand when the lecturer asked, "any questions?" and asked, "how does a hard drive work?"
Was he just really good at playing the straight man to his own terrible jokes? Maybe. I did laugh a lot when we were discussing the limitations of ASCII and how it couldn't possibly represent all languages in the world. The professor socratically asked, "For example, how many letters or characters are there in the Chinese language" and my favorite buddy raised his hand and said, "Seven."